Rainy is a distinctive girls' name in United States, ranking #5965 in 2013 with 22 recorded births. The name reached its all-time peak in 2014 with 31 births ranking #4630. Since 1996, the popularity has increased by 22.2%. In 2013, approximately 1 in every 79,746 girls born was named Rainy. FALLING Recent data shows the name is currently falling.